conversion:TemplatedTopicsEnhancement

Example that finally pushed this long-needed feature to implementation: hackerceo-org/vivo2doi (draft modeling notes)

Also done here for file format prov:alternateOfs.

https://github.com/timrdf/csv2rdf4lod-automation/issues/383

public CSVtoRDF(...
   this.rowTopics = this.eParams.getRowTopics();

public Set<Resource> DefaultEnhancementParameters.getRowTopics() {
   @Override
   public Set<Resource> getRowTopics() {
     ...
         for( Statement statement : Iterations.asList(conn.getStatements(null, Conversion.topic, null, false)) ) {
            if( statement.getObject() instanceof Resource ) {
               topics.add((Resource) statement.getObject());
            }
         }

...

public HashMap<URI,Set<Value>> DefaultEnhancementParameters.getTopicDescriptions(Resource topic) {
      
      HashMap<URI,Set<Value>> descriptions = new HashMap<URI,Set<Value>>();
      
      RepositoryConnection conn = null;
      try {
         conn = this.paramsRepository.getConnection();
         for( Statement statement : Iterations.asList(conn.getStatements(topic, null, null, false)) ) {
            if( ! descriptions.containsKey(statement.getPredicate()) ) {
               descriptions.put(statement.getPredicate(), new HashSet<Value>());
            }
            descriptions.get(statement.getPredicate()).add(statement.getObject());
         }

public void visit(CSVRecord record, long rowNum) {
      ...
      for( Resource topic : topDownTemplate(rowTopics, primary, ancillary) ) {
         if( topic instanceof URI ) {
            subjects.add((URI) topic);
         }
      }

   // "Normal" tabular-like processing is applied to the set of 'subjects'.

   private Set<Resource> topDownTemplate(Resource topic,
                                         RepositoryConnection primary,
                                         RepositoryConnection ancillary,
                                         String indent) {
      
      logger.fine(indent + "topic: " + topic);
      
      HashMap<URI, Set<Value>> descriptions = eParams.getTopicDescriptions(topic);
      
      Set<Resource> topicRs = new HashSet<Resource>();
      if( descriptions.containsKey(Conversion.name) ) {
         for( Value templateV : descriptions.get(Conversion.name) ) {
            logger.fine(indent+"  name template: " + templateV.stringValue());
            String filled = this.csvRecordFiller.fillTemplate(templateV.stringValue());
            if( ResourceValueHandler.isURI(filled) ) {
               topicRs.add(vf.createURI(filled));
            }else {
               // TODO: use ResourceValueHandler's URI creation.
               topicRs.add(vf.createURI(sdv.getURIUpToVersion()+"/"+filled));
            }
         }
      }
      if( topicRs.size() == 0 ) {
         topicRs.add(vf.createURI(sdv.getURIUpToVersion() + NameFactory.getUUIDName()));
      }

      for( Resource topicR : topicRs ) {
         for( URI predicate : descriptions.keySet() ) {
            if( !predicate.equals(Conversion.name) ) {
               for ( Value object : descriptions.get(predicate)) {
                  logger.fine(indent+"  " + predicate.stringValue() + " " + object.stringValue());
                  if( object instanceof URI ) {
                     try {
                        primary.add(topicR, predicate, object);
                     } catch (RepositoryException e) {
                        e.printStackTrace();
                     }
                  }else if( object instanceof Resource ) {
                     Set<Resource> objectRs = topDownTemplate((Resource) object, primary, ancillary, indent+"  ");
                     if( objectRs != null ) {
                        for( Resource objectR : objectRs ) {
                           if( objectR instanceof URI ) {
                              try {
                                 primary.add(topicR, predicate, objectR);
                              } catch (RepositoryException e) {
                                 e.printStackTrace();
                              }
                           }
                        }
                     }
                  }
               }
            }
         }
      }

What is next

• Using template variables to construct new values